I can get behind Draft Pick Normal for solos. However, I really don't see solo ranked 3s being successful since there is no clearly defined meta game that most players would dislike the experience given with randomly selecting team members.
two ad, one ap
top ad jungles top
two bot keep red buff control sound familiar??
also bump to ranked solo queue,
I never have both my ranked teammates on at any given time
furthermore, the problem with rando teammates is that they suck because riot has to balance the solo queue teams, not that they are random
with ranked solo your elo will filter out all the bads making an overall experience to solo queue better